Drawing instrument.



l. A. KRK. DRAWING INSTRUMENT. APPucATloN FILED APR'. 1. |916.

1,281,790. Patented 0015.151918.

@Za/ffl f/ WITNESSES ATTORNEY Vtion ric JOHN AMES KIRK, OF BUCYRU'S, OHIO.

DRAWING INSTRUMENT.

Specification of Letters Patent. Patntd 001;, 15, i918.

Application Hed April 1, 1916. Serial No. 88,366.

To all whom t may concern:

Be it known that I, JOHN A. KIRK, a citi- Zen of the United States, residing at Buoyrus, in the county of Crawford and. State of Ohio, have'invented certain new and useful Improvements in Drawing Instruments, of which the following is a specification.

My invention relates t0 drawing instruments and more particularly to a combination drawing instrument for drawing and spacing lines in parallel, drawing circles and. for laying off working points. v

The primary object of my invention resides in the provision of a spacing device and novel means associated with the body of the ruler for coperating with thespacing device, for facilitating the spacing of section lines atA various angles.

Another object of my invention resides in the provision of a novel compass arm adjustably mounted on the ruler for coperating with the compass center point.

A still further obj ect of my invention resides in the provision of mounting these parts on a ruler so that they each cooperate to perform their various functions in an eilicient manner. Y

A .still further object of my inventionresides in the provision of a device of the character described that is simple in construction, eficient'in operation and one that can be manufactured and placed on the market at a minimumcost.

Other objects as well as the nature, characteristic features and scope of my invention will be more readily understood from the following description taken in connec-v tion with the accompanying drawings and pointed out in the claims forming a part of thisv specification.

In the drawings Figure l isLa. top plan Yview of my inven- Fig. 2 is an enlarged transverse sectional View of the ruler showing to advantage the arrangement of the pawl and ratchet means for controlling the movement ofthe ruler.

when spacing lines; Y

Fig. 3 1s an enlarged'end elevational View Fig. 4L is an enlarged end elevational view taken at the opposite end of the ruler;

Fig. 5 is an enlarged longitudinal sectional view illustrating "to advantage the compass arm for holding the pencil;

Fig. 6 is an enlarged fragmentary sectional view showing the means for mounting the indicator and the movable sectional arm on the ruler;

Fig. 7 is a fragmentary enlarged perspective view of one end' of the ruler illustrating to advantage the manner in which the free end of the movable arm is associated therewith when not in use.

Referring more particularly to the drawings in which similar reference numerals designate like or corresponding parts'througlr out the various views, I provide, a ruler body 1 having Va beveled edge indicated by the numeral 2, the upper surfaces of the body being provided adjacent the forward edge with a longitudinal groove 3 and also provided on its rear edge with a longitudinal recess 4. The body is further provided with a longitudinally extending slot 5 the ends' of which are enlarged as indicated by the numeral 6 all for a purpose to be hereinaftery described'. j

Disposed on the upper surfaces of the body conforming to the beveled edge 2 is a plate 7, said plate being provided with a longitudinal slot 18 which is Varranged in registration with the slot 5 and also provided with a longitudinal slot 9 arranged in parallel relation with theslot 8 and in registration with the groove 3.

The ends of the plate are bent downwardly to conform to the endsof the body as indicated by the numerals 10 and 11. Rotatably mounted in brackets 12 is a shaft 13. Carried adjacent the respective ends of the consist ofratchet wheels 16 and 17, of differentdiameterss'ecured to the shaft 13, and

a pawl 18 having an end 19 passing through the slot 9 and engaging one edge of the plate 7-Fig. 2.

Cooperating with the spacing means on the ruler is my improved angle determining arm 21 having graduations thereon, one edge of which has a lateral extension which is bent upon itself as indicated by the numeral 22 and extending in an opposite direction and terminating in a point to serve as an indicator 23. The inner end of the arm 21Y is provided with an opening as is the inner end of the indicator which openings are in alinement with each other for a purpose to be described. The end 10 is provided adjacent its upper edge with a slot 24 which permits the arm 21 to be extended into the pocket or recess 25 with the extension extending through the end 10. An extension 26 projects laterally from the' lower edge of the end 10 and is bent uponitself within ythe recess 25 to provide a spring 27. When the arm is arranged withinv thefrecess, the indicator rests upon the plate 1, and in order to secure the parts in this position I provide a screw 28 which passes through the alined openings in the indicator on the arm and also through the alining openings in the plates 7 and the spring extension, said screw serving to frictionally maintain the parts in position while the spring serves as a yielding support for the arm. In procuring various angles I have scribed a segment of a circle 29 adjacent one end using the opening for receiving the screw as a center, also I have arranged graduations along the line. The pointed indicator 23 is arranged adjacent this circle and by adjusting the indicator with respect to the segment the desired angle is secured. When not in use the arm and indicatorare swung inwardly, the arm being arranged within the recess v4, the outer end thereof which serves as a supportingleg 30 being arranged within a recess 31 in the opposite end llrof the plate, this arrangement incidentally enhancing the appearance of the device. Y

To adapt the device as a compass a stud 32 `is slidable in the slot 9 and has an arm 34 which is provided at its free end with a finger piece 37 anda marking point 36. A `plate 35 is'iitted in thevlower face of the ruler and extends:transverselythereof and each end is adapted to receive lan element39 provided with a point 38 `whichvcenters'the yruler when, striking a circle. Y

' 'Fordrawing'radii with eitheredge ofthe `ruler'as directing means,aplate 41 is transversely slidable on an end of the ruler, being held in theadjusted positionby a screwv 43 passing through a slot 42.y An arm 4 5 is pivoted to the plate 41 at one end and its opposite` end has va centeringpoint 48 which may be brought inline with either edge of the ruler and secured by a catch 49 at each end of the plate 41.

Although I have shown and described the preferred embodiment of my invention I desire it to be understood that I am not to be limited to the exact details shown, however, I desire that great stress be laid upon the movable arm for drawing section lines.

From V,the above description taken in connection with the accompanying drawings, it can -easily be seen that I have provided a device that is simple in construction, containing but a few simple parts that can be cheaply manufactured and assembled and whenl assembled can be placed upon the market and sold at a low cost.

Y It will be understood that .the above description and accompanying drawings comprehend only. the general embodiment of my inventionand that various minor changes in detail lof construction, proportion and arrangement oi'y the parts may .bemade within the scope .of the appended claims land withyout sacrificing any of the advantages of my invention. A

Having thus fully described my inVeniOn, what I claaim as new andidesire to secure by Letters Patent; is Y 1. A drawinv instrument including a body havingV a vided with a recess, a metallic plate disposed on the body and provided with a slot arranged in registration with the slot of the body, means mounted in the slot `or'su porting thebody, means for controlling t e movement of the body, an arm pivotally connected to the body for swinging movement vfrom the body and engaged in said recess when not in use, and an indicator extending from the movable arm and arranged upon the plate for determining the angular inclination of the arm from the body.

2. A drawing I instru-ment including a `body provided with a recess, a plate disposed on said'body, an arm pivotally. connectedto the plate for swinging movement from the body and positioned in said recess when not in use, and an indicator extending from the movable .arm and arranged upon ot therein and further prothe plate for determining'the angular inclination of the arm with respect tothe body.

3. A .drawing instrument including a body Vhaving a recess ormedtherein, a plate upon' thebody extending beyond one end thereof and provided' with scale markings and with a depending flange,fa vsupporting tongue extending from the flange toward the body, the flange being provided with an opening, an arm pivotally .connectedV with the tongue for swinging movement toward and away lfromv the body `and fitting into the ,recess vwhen not in use, and an indicator eX- tending from the pivoted end ofthe arm through the opening of the flange andbent to extend across the plate in operative relation to the scale markings upon the plate.

4. A drawing instrument including a carrier, a depending flange at one end of said carrier provided with an opening, a support extending from the ange beneath the carrier, an arm pivotally connected with the support for swinging movement toward and away from the carrier, and a tongue eX- tending from the arm through the opening of the flange and extended upwardly and across the carrier to provide a pointer positioned in operative relation to the scale markings upon the carrier.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN AMES KIRK.

Witnesses:

E. L. RICE, PAUL A. VFRAZEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

